Godogs,
One of the "problems" with Bergers (as I have pointed out many times here, and in print, since 2007, when I first got to field-test them extensively) is that they don't act like the conventional idea of expanding bullet performance most hunters have been indoctrinated with for the last several decades--which generally involves weight-retention, penetration, "perfect mushrooms", etc. The fact that they penetrate at least 2-3" before "grenading" is thus often lost on many hunters.
But if the impact velocity is low enough--and the bullet doesn't hit, say, even a rib--Bergers can indeed end up looking like conventional expanding bullets. This tends to happen more at longer ranges. Whether or not it matters is another question.
